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Triple- and Quadruple-Mode Wideband Bandpass Filter Using Simple Perturbation in Single Metal Cavity.
- Source :
-
IEEE Transactions on Microwave Theory & Techniques . Oct2015 Part 2, Vol. 63 Issue 10b, p3416-3424. 9p. - Publication Year :
- 2015
-
Abstract
- This paper proposes a novel class of wideband metal cavity multiple-mode bandpass filters (BPFs), consisting of a triple-mode filter and a quadruple-mode filter. Two TE11 degeneration modes in a single metal cavity are excited by using an off-centered approach instead of a traditional corner-cut approach. They work together with the TM10 mode to constitute a three-pole wide passband with a fractional bandwidth of 30% at the central frequency of 3.2 GHz. Moreover, an off-centered metal cylinder can properly excite an extra TM11 mode in the passband. As such, this TM11 mode, TM10 mode, and a pair of degeneration TE11 modes can be simultaneously utilized to form a quadruple-mode BPF. Compared with the triple-mode BPF, the quadruple-mode BPF has better performance in term of the steepness of rejection skirt. The fractional bandwidth of this BPF can achieve up to 31%. In final, the two proposed BPFs are fabricated by using the silver plated aluminum technology. Measured S-parameter frequency response and group delay have satisfactorily matched with the simulated results. [ABSTRACT FROM PUBLISHER]
- Subjects :
- *BANDPASS filters
*QUANTUM perturbations
*BANDWIDTHS
*ALUMINUM
*FREQUENCY response
Subjects
Details
- Language :
- English
- ISSN :
- 00189480
- Volume :
- 63
- Issue :
- 10b
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Microwave Theory & Techniques
- Publication Type :
- Academic Journal
- Accession number :
- 110172092
- Full Text :
- https://doi.org/10.1109/TMTT.2015.2460234